LoRaWAN – Wayne Connor

How to set up an alert

Wayne — Thu, 17 Oct 2024 03:49:52 +0000

I wanted Home assistant to alert my phone of the Main water tank has a leak. (Is emptying too fast for longer than 1/2 hr)

Monitor Flow Rate

Need to monitor flow rate.

Go to Settings: Devices and Services then Helpers

Click on + Create Helper

Select Derivative

Choose your tank level as the sensor, then select the time duration.

The Helper will use calculate to give hte derivative of the sensor (turn the absolute level into a flow rate).

Watch the flow rate to determine normal values

Create a card in your dashboard and watch the flow rate for a few days.
You will be able to see what the flow rate normally is.

Create an Automation to detect large values

Create an automatic that says When flow rate is below ‘xxx’ warn me.

For me it was when dam tank derivative is below -0.18 send a notification via mobile_app_wayne with message “Dam tank is flowing fast”

Lorawan

Wayne — Fri, 01 Mar 2024 06:36:59 +0000

Setting up a LoRaWAN gateway for our hobby farm to check the water levels and turn pumps on and off.

Firstly I set up one of these, the cheapest I could find with the newer SX1302 chipset.

Worked fine with the devices, and the things network, but I could not get it to talk ot the MQQT server in Home Assistant.

Then 2nd try was one of these, RAK7268V2

It played more nicely with Home Assistant.

Setting up

Put in the IP address etc to get it set up in your network so you can see it’s home page.
I just selected Australia AU915 and left all the other settings to the default.
I plugged it in and it starts noting end devices even before I even told it about them:

Set up MQQT server to forward to Lorawan. Under configuration, Integration Interface, as follows:

Make an application

Add end device into that applications.

Now wait for it to show up here:

Understanding LoRaWAN payloads

Wayne — Sat, 28 Oct 2023 01:18:11 +0000

I have a Dragino Water Pressure meter and the depth values didn’t seem to be updating. So I was trying to work out which numbers in the raw payload data represented the mA readings of the meter. It turns out the data is encrypted. So you cannot manually extract the payload data you need to have it decrypted by your gateway.

See these:

ASCII payload HEX payload mA reading

DMYAACArAAAA 44 4D 59 41 41 43 41 72 41 41 41 41 8.23

DMYAAB0RAAAA 44 4D 59 41 41 42 30 52 41 41 41 41 7.44

DMYAABnOAAAA 44 4D 59 41 41 42 6E 4F 41 41 41 41 6.06

DMYAABYvAAAA 44 4D 59 41 41 42 59 76 41 41 41 41 5.67

DMYAABKWAAAA 44 4D 59 41 41 42 4B 57 41 41 41 41 4.75

The mA readings have no obvious correlation to the payloads as the payloads are encrypted.